Sometimes, you have to go with what works. It's no secret that some mechanics are tried-and-true, and will allow you to please gamers while adding in your own twists. Sometimes, though, it's evident when a game borrows a bit too much and doesn't give enough back.
Happy Vikings mixes gameplay from a number of different classic puzzle titles, including a lifting-and-matching mechanic from an NES game called Wario's Woods. Instead of just flipping tiles with a cursor, you actually have a sprite in the puzzle area which you can use to manipulate tiles. This is the titular "happy Viking." Our Viking (let's call him "Olaf") can lift and push treasure, booze, and food to form shapes beginning with three tiles.